diff --git a/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/main/java/org/finos/legend/engine/language/pure/grammar/integration/connection/MongoDBConnectionParseTreeWalker.java b/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/main/java/org/finos/legend/engine/language/pure/grammar/integration/connection/MongoDBConnectionParseTreeWalker.java
index 9b468941432..d3b8032020c 100644
--- a/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/main/java/org/finos/legend/engine/language/pure/grammar/integration/connection/MongoDBConnectionParseTreeWalker.java
+++ b/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/main/java/org/finos/legend/engine/language/pure/grammar/integration/connection/MongoDBConnectionParseTreeWalker.java
@@ -42,19 +42,14 @@ public MongoDBConnectionParseTreeWalker(ParseTreeWalkerSourceInformation walkerS
     public void visitMongoDBConnectionValue(MongoDBConnectionParserGrammar.DefinitionContext ctx, MongoDBConnection connectionValue, boolean isEmbedded)
     {
         // store (optional if the store is provided by embedding context, if not provided, it is required)
-        MongoDBConnectionParserGrammar.ConnectionStoreContext connectionStoreContext = PureGrammarParserUtility.validateAndExtractRequiredField(ctx.connectionStore(), "store", connectionValue.sourceInformation);
+        MongoDBConnectionParserGrammar.ConnectionStoreContext connectionStoreContext = PureGrammarParserUtility.validateAndExtractOptionalField(ctx.connectionStore(), "store", connectionValue.sourceInformation);
         if (connectionStoreContext != null)
         {
             connectionValue.element = PureGrammarParserUtility.fromQualifiedName(connectionStoreContext.qualifiedName().packagePath() == null ? Collections.emptyList() : connectionStoreContext.qualifiedName().packagePath().identifier(), connectionStoreContext.qualifiedName().identifier());
             connectionValue.elementSourceInformation = this.walkerSourceInformation.getSourceInformation(connectionStoreContext.qualifiedName());
-            connectionValue.type = DatabaseType.MongoDb;
-        }
-        else if (!isEmbedded)
-        {
-            // Copied from service store, do we need this??
-            PureGrammarParserUtility.validateAndExtractRequiredField(ctx.connectionStore(), "store", connectionValue.sourceInformation);
         }
         // database type
+        connectionValue.type = DatabaseType.MongoDb;
         MongoDBDatasourceSpecification dsSpecification = getMongoDBDatasourceSpecification(ctx, connectionValue);
         connectionValue.dataSourceSpecification = dsSpecification;
 
diff --git a/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/test/java/org/finos/legend/engine/language/pure/grammar/integration/TestMongoDBConnectionCompiler.java b/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/test/java/org/finos/legend/engine/language/pure/grammar/integration/TestMongoDBConnectionCompiler.java
index 4899126013e..c2e61c3c0ca 100644
--- a/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/test/java/org/finos/legend/engine/language/pure/grammar/integration/TestMongoDBConnectionCompiler.java
+++ b/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/test/java/org/finos/legend/engine/language/pure/grammar/integration/TestMongoDBConnectionCompiler.java
@@ -28,7 +28,6 @@ protected String getDuplicatedElementTestCode()
                 "MongoDBConnection test::mongodb::connection" +
                 "{\n" +
                 "  database: legend_db;\n" +
-                "  store: mongo::test::db;\n" +
                 "  serverURLs: [localhost:27071];\n" +
                 "  authentication: # UserPassword {\n" +
                 "    username: 'mongo_ro';\n" +
@@ -47,7 +46,7 @@ protected String getDuplicatedElementTestCode()
     @Override
     protected String getDuplicatedElementTestExpectedErrorMessage()
     {
-        return "COMPILATION error at [16:1-18:1]: Duplicated element 'test::mongodb::connection'";
+        return "COMPILATION error at [15:1-17:1]: Duplicated element 'test::mongodb::connection'";
     }
 
     @Test
@@ -60,7 +59,6 @@ public void testMongoDBConnectionDefinitionv1()
                 "MongoDBConnection test::testConnection\n" +
                 "{\n" +
                 "  database: legend_db;\n" +
-                "  store: meta::external::store::mongodb::showcase::store::PersonDatabase;\n" +
                 "  serverURLs: [localhost:27071];\n" +
                 "  authentication: # UserPassword {\n" +
                 "    username: 'mongo_ro';\n" +
diff --git a/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/test/java/org/finos/legend/engine/language/pure/grammar/integration/TestMongoDBConnectionGrammarParser.java b/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/test/java/org/finos/legend/engine/language/pure/grammar/integration/TestMongoDBConnectionGrammarParser.java
index a2b236777d1..e02bd27b11d 100644
--- a/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/test/java/org/finos/legend/engine/language/pure/grammar/integration/TestMongoDBConnectionGrammarParser.java
+++ b/legend-engine-xts-mongodb/legend-engine-xt-nonrelationalStore-mongodb-grammar-integration/src/test/java/org/finos/legend/engine/language/pure/grammar/integration/TestMongoDBConnectionGrammarParser.java
@@ -37,7 +37,6 @@ public String getParserGrammarIdentifierInclusionTestCode(List<String> keywords)
                 "MongoDBConnection " + ListAdapter.adapt(keywords).makeString("::") + "\n" +
                 "{\n" +
                 "  database: legend_db;\n" +
-                "  store: mongo::test::db;\n" +
                 "  serverURLs: [localhost:27071];\n" +
                 "  authentication: # UserPassword {\n" +
                 "    username: 'mongo_ro';\n" +
diff --git a/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/main/java/org/finos/legend/engine/language/pure/grammar/from/RelationalDatabaseConnectionParseTreeWalker.java b/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/main/java/org/finos/legend/engine/language/pure/grammar/from/RelationalDatabaseConnectionParseTreeWalker.java
index d14fe27502a..848debb5114 100644
--- a/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/main/java/org/finos/legend/engine/language/pure/grammar/from/RelationalDatabaseConnectionParseTreeWalker.java
+++ b/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/main/java/org/finos/legend/engine/language/pure/grammar/from/RelationalDatabaseConnectionParseTreeWalker.java
@@ -50,11 +50,6 @@ public void visitRelationalDatabaseConnectionValue(RelationalDatabaseConnectionP
             connectionValue.element = PureGrammarParserUtility.fromQualifiedName(storeContext.qualifiedName().packagePath() == null ? Collections.emptyList() : storeContext.qualifiedName().packagePath().identifier(), storeContext.qualifiedName().identifier());
             connectionValue.elementSourceInformation = this.walkerSourceInformation.getSourceInformation(storeContext.qualifiedName());
         }
-        else if (!isEmbedded)
-        {
-            // non-embedded connection requires store
-            PureGrammarParserUtility.validateAndExtractRequiredField(ctx.connectionStore(), "store", connectionValue.sourceInformation);
-        }
         // database type
         RelationalDatabaseConnectionParserGrammar.DbTypeContext dbTypeCtx = PureGrammarParserUtility.validateAndExtractRequiredField(ctx.dbType(), "type", connectionValue.sourceInformation);
         try
diff --git a/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/test/java/org/finos/legend/engine/language/pure/compiler/test/TestRelationalCompilationFromGrammar.java b/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/test/java/org/finos/legend/engine/language/pure/compiler/test/TestRelationalCompilationFromGrammar.java
index 2278dfbd4f8..aaf0ccca908 100644
--- a/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/test/java/org/finos/legend/engine/language/pure/compiler/test/TestRelationalCompilationFromGrammar.java
+++ b/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/test/java/org/finos/legend/engine/language/pure/compiler/test/TestRelationalCompilationFromGrammar.java
@@ -2170,7 +2170,6 @@ public void testForMultipleRelationalConnections()
                 "###Connection\n" +
                 "RelationalDatabaseConnection relational::graphFetch::RelationalConnection\n" +
                 "{\n" +
-                "  store: relational::graphFetch::dbInc;\n" +
                 "  type: H2;\n" +
                 "  specification: Static\n" +
                 "  {\n" +
@@ -2225,7 +2224,7 @@ public void testForMultipleRelationalConnections()
                 "      connection_1: relational::graphFetch::OneMappingConnection\n" +
                 "    ]\n" +
                 "  ];\n" +
-                "}\n", "COMPILATION error at [90:1-108:1]: Found 2 connections against store [dbInc] under a single runtime.");
+                "}\n", "COMPILATION error at [89:1-107:1]: Found 2 connections against store [dbInc] under a single runtime.");
     }
 
     @Test
diff --git a/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/test/java/org/finos/legend/engine/language/pure/grammar/test/TestRelationalConnectionGrammarParser.java b/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/test/java/org/finos/legend/engine/language/pure/grammar/test/TestRelationalConnectionGrammarParser.java
index 717141de685..0decfd55cbf 100644
--- a/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/test/java/org/finos/legend/engine/language/pure/grammar/test/TestRelationalConnectionGrammarParser.java
+++ b/legend-engine-xts-relationalStore/legend-engine-xt-relationalStore-generation/legend-engine-xt-relationalStore-grammar/src/test/java/org/finos/legend/engine/language/pure/grammar/test/TestRelationalConnectionGrammarParser.java
@@ -60,7 +60,7 @@ public void testRelationalDatabaseConnection()
         test("###Connection\n" +
                 "RelationalDatabaseConnection meta::mySimpleConnection\n" +
                 "{\n" +
-                "}\n\n", "PARSER error at [2:1-4:1]: Field 'store' is required");
+                "}\n\n", "PARSER error at [2:1-4:1]: Field 'type' is required");
         test("###Connection\n" +
                 "RelationalDatabaseConnection meta::mySimpleConnection\n" +
                 "{\n" +