diff --git a/pkg/sqlite/migrations/49_postmigrate.go b/pkg/sqlite/migrations/49_postmigrate.go
index 941cf6a8802..c39bc5f3191 100644
--- a/pkg/sqlite/migrations/49_postmigrate.go
+++ b/pkg/sqlite/migrations/49_postmigrate.go
@@ -133,17 +133,17 @@ func (m *schema49Migrator) migrateSavedFilters(ctx context.Context) error {
 
 			newFindFilter, err := m.getFindFilter(asRawMessage)
 			if err != nil {
-				return fmt.Errorf("failed to get find filter for saved filter %d: %w", id, err)
+				return fmt.Errorf("failed to get find filter for saved filter  %s : %w", findFilter, err)
 			}
 
 			objectFilter, err := m.getObjectFilter(mode, asRawMessage)
 			if err != nil {
-				return fmt.Errorf("failed to get object filter for saved filter %d: %w", id, err)
+				return fmt.Errorf("failed to get object filter for saved filter  %s : %w", findFilter, err)
 			}
 
 			uiOptions, err := m.getDisplayOptions(asRawMessage)
 			if err != nil {
-				return fmt.Errorf("failed to get display options for saved filter %d: %w", id, err)
+				return fmt.Errorf("failed to get display options for saved filter  %s : %w", findFilter, err)
 			}
 
 			_, err = m.db.Exec("UPDATE saved_filters SET find_filter = ?, object_filter = ?, ui_options = ? WHERE id = ?", newFindFilter, objectFilter, uiOptions, id)
@@ -252,23 +252,29 @@ func (m *schema49Migrator) convertCriterion(mode models.FilterMode, out map[stri
 	}
 	delete(ret, "type")
 
-	// Find out whether the object needs some adjustment/has non-string content attached
-	// Only adjust if value is present
-	if v, ok := ret["value"]; ok && v != nil {
-		var err error
-		switch {
-		case arrayContains(migrate49TypeResolution["Boolean"], field):
-			ret["value"], err = m.adjustCriterionValue(ret["value"], "bool")
-		case arrayContains(migrate49TypeResolution["Int"], field):
-			ret["value"], err = m.adjustCriterionValue(ret["value"], "int")
-		case arrayContains(migrate49TypeResolution["Float"], field):
-			ret["value"], err = m.adjustCriterionValue(ret["value"], "float64")
-		case arrayContains(migrate49TypeResolution["Object"], field):
-			ret["value"], err = m.adjustCriterionValue(ret["value"], "object")
-		}
+	// unset the value for IS_NULL or NOT_NULL modifiers
+	modifier := models.CriterionModifier(ret["modifier"].(string))
+	if modifier == models.CriterionModifierIsNull || modifier == models.CriterionModifierNotNull {
+		delete(ret, "value")
+	} else {
+		// Find out whether the object needs some adjustment/has non-string content attached
+		// Only adjust if value is present
+		if v, ok := ret["value"]; ok && v != nil {
+			var err error
+			switch {
+			case arrayContains(migrate49TypeResolution["Boolean"], field):
+				ret["value"], err = m.adjustCriterionValue(ret["value"], "bool")
+			case arrayContains(migrate49TypeResolution["Int"], field):
+				ret["value"], err = m.adjustCriterionValue(ret["value"], "int")
+			case arrayContains(migrate49TypeResolution["Float"], field):
+				ret["value"], err = m.adjustCriterionValue(ret["value"], "float64")
+			case arrayContains(migrate49TypeResolution["Object"], field):
+				ret["value"], err = m.adjustCriterionValue(ret["value"], "object")
+			}
 
-		if err != nil {
-			return fmt.Errorf("failed to adjust criterion value for %q: %w", field, err)
+			if err != nil {
+				return fmt.Errorf("failed to adjust criterion value for %q: %w", field, err)
+			}
 		}
 	}
 
diff --git a/ui/v2.5/src/models/list-filter/criteria/criterion.ts b/ui/v2.5/src/models/list-filter/criteria/criterion.ts
index 6b2b79ac2e1..c6bc8a4c5f8 100644
--- a/ui/v2.5/src/models/list-filter/criteria/criterion.ts
+++ b/ui/v2.5/src/models/list-filter/criteria/criterion.ts
@@ -143,7 +143,10 @@ export abstract class Criterion<V extends CriterionValue> {
   }
 
   public setFromEncodedCriterion(encodedCriterion: IEncodedCriterion<V>) {
-    if (encodedCriterion.value !== undefined) {
+    if (
+      encodedCriterion.value !== undefined &&
+      encodedCriterion.value !== null
+    ) {
       this.value = encodedCriterion.value;
     }
     this.modifier = encodedCriterion.modifier;