diff --git a/packages/cli/src/deploy/ensureTables.ts b/packages/cli/src/deploy/ensureTables.ts
index 6f2deac46b..c8ef52e2e2 100644
--- a/packages/cli/src/deploy/ensureTables.ts
+++ b/packages/cli/src/deploy/ensureTables.ts
@@ -8,12 +8,12 @@ import {
   getSchemaTypes,
   getValueSchema,
   getKeySchema,
-  KeySchema,
 } from "@latticexyz/protocol-parser/internal";
 import { debug } from "./debug";
 import { getTables } from "./getTables";
 import pRetry from "p-retry";
 import { Table } from "@latticexyz/config";
+import { isDefined } from "@latticexyz/common/utils";
 
 export async function ensureTables({
   client,
@@ -24,15 +24,56 @@ export async function ensureTables({
   readonly worldDeploy: WorldDeploy;
   readonly tables: readonly Table[];
 }): Promise<readonly Hex[]> {
-  const worldTables = await getTables({ client, worldDeploy });
-  const worldTableIds = worldTables.map((table) => table.tableId);
+  const configTables = new Map(
+    tables.map((table) => {
+      const keySchema = getSchemaTypes(getKeySchema(table));
+      const valueSchema = getSchemaTypes(getValueSchema(table));
+      const keySchemaHex = keySchemaToHex(keySchema);
+      const valueSchemaHex = valueSchemaToHex(valueSchema);
+      return [
+        table.tableId,
+        {
+          ...table,
+          keySchema,
+          keySchemaHex,
+          valueSchema,
+          valueSchemaHex,
+        },
+      ];
+    }),
+  );
 
-  const existingTables = tables.filter((table) => worldTableIds.includes(table.tableId));
+  const worldTables = await getTables({ client, worldDeploy });
+  const existingTables = worldTables.filter(({ tableId }) => configTables.has(tableId));
   if (existingTables.length) {
     debug("existing tables:", existingTables.map(resourceToLabel).join(", "));
+
+    const schemaErrors = existingTables
+      .map((table) => {
+        const configTable = configTables.get(table.tableId)!;
+        if (table.keySchemaHex !== configTable.keySchemaHex || table.valueSchemaHex !== configTable.valueSchemaHex) {
+          return [
+            `"${resourceToLabel(table)}" table:`,
+            `  Registered schema: ${JSON.stringify({ schema: getSchemaTypes(table.schema), key: table.key })}`,
+            `      Config schema: ${JSON.stringify({ schema: getSchemaTypes(configTable.schema), key: configTable.key })}`,
+          ].join("\n");
+        }
+      })
+      .filter(isDefined);
+
+    if (schemaErrors.length) {
+      throw new Error(
+        [
+          "Table schemas are immutable, but found registered tables with a different schema than what you have configured.",
+          ...schemaErrors,
+          "You can either update your config with the registered schema or change the table name to register a new table.",
+        ].join("\n\n") + "\n",
+      );
+    }
   }
 
-  const missingTables = tables.filter((table) => !worldTableIds.includes(table.tableId));
+  const existingTableIds = new Set(existingTables.map(({ tableId }) => tableId));
+  const missingTables = tables.filter((table) => !existingTableIds.has(table.tableId));
   if (missingTables.length) {
     debug("registering tables:", missingTables.map(resourceToLabel).join(", "));
     return await Promise.all(
@@ -50,7 +91,7 @@ export async function ensureTables({
               args: [
                 table.tableId,
                 valueSchemaToFieldLayoutHex(valueSchema),
-                keySchemaToHex(keySchema as KeySchema),
+                keySchemaToHex(keySchema),
                 valueSchemaToHex(valueSchema),
                 Object.keys(keySchema),
                 Object.keys(valueSchema),
diff --git a/packages/cli/src/deploy/getTables.ts b/packages/cli/src/deploy/getTables.ts
index 196b24421e..54b0b717cf 100644
--- a/packages/cli/src/deploy/getTables.ts
+++ b/packages/cli/src/deploy/getTables.ts
@@ -1,4 +1,4 @@
-import { Client, decodeAbiParameters, parseAbiParameters } from "viem";
+import { Client, Hex, decodeAbiParameters, parseAbiParameters } from "viem";
 import { hexToResource } from "@latticexyz/common";
 import { WorldDeploy } from "./common";
 import { debug } from "./debug";
@@ -16,7 +16,12 @@ import { fetchBlockLogs } from "@latticexyz/block-logs-stream";
 import { flattenStoreLogs, getStoreLogs } from "@latticexyz/store/internal";
 
 // TODO: add label and namespaceLabel once we register it onchain
-type DeployedTable = Omit<Table, "label" | "namespaceLabel">;
+type DeployedTable = Omit<Table, "label" | "namespaceLabel"> & {
+  readonly keySchema: Schema;
+  readonly keySchemaHex: Hex;
+  readonly valueSchema: Schema;
+  readonly valueSchemaHex: Hex;
+};
 
 export async function getTables({
   client,
@@ -49,12 +54,17 @@ export async function getTables({
       log.args.keyTuple,
     );
     const { type, namespace, name } = hexToResource(tableId);
-    const value = decodeValueArgs(getSchemaTypes(getValueSchema(storeConfig.namespaces.store.tables.Tables)), log.args);
+    const recordValue = decodeValueArgs(
+      getSchemaTypes(getValueSchema(storeConfig.namespaces.store.tables.Tables)),
+      log.args,
+    );
 
-    const solidityKeySchema = hexToSchema(value.keySchema);
-    const solidityValueSchema = hexToSchema(value.valueSchema);
-    const keyNames = decodeAbiParameters(parseAbiParameters("string[]"), value.abiEncodedKeyNames)[0];
-    const fieldNames = decodeAbiParameters(parseAbiParameters("string[]"), value.abiEncodedFieldNames)[0];
+    const keySchemaHex = recordValue.keySchema;
+    const valueSchemaHex = recordValue.valueSchema;
+    const solidityKeySchema = hexToSchema(keySchemaHex);
+    const solidityValueSchema = hexToSchema(valueSchemaHex);
+    const keyNames = decodeAbiParameters(parseAbiParameters("string[]"), recordValue.abiEncodedKeyNames)[0];
+    const fieldNames = decodeAbiParameters(parseAbiParameters("string[]"), recordValue.abiEncodedFieldNames)[0];
 
     const valueAbiTypes = [...solidityValueSchema.staticFields, ...solidityValueSchema.dynamicFields];
 
@@ -73,6 +83,10 @@ export async function getTables({
       tableId,
       schema: { ...keySchema, ...valueSchema },
       key: Object.keys(keySchema),
+      keySchema,
+      keySchemaHex,
+      valueSchema,
+      valueSchemaHex,
     };
   });
 
diff --git a/packages/protocol-parser/src/getKeySchema.ts b/packages/protocol-parser/src/getKeySchema.ts
index 3d6ed45efe..7c035cb729 100644
--- a/packages/protocol-parser/src/getKeySchema.ts
+++ b/packages/protocol-parser/src/getKeySchema.ts
@@ -15,7 +15,7 @@ export type getKeySchema<table extends PartialTable> = PartialTable extends tabl
   ? ResolvedKeySchema
   : {
       readonly [fieldName in Extract<keyof table["schema"], table["key"][number]>]: table["schema"][fieldName] & {
-        type: StaticAbiType;
+        readonly type: StaticAbiType;
       };
     };