diff --git a/packages/twenty-server/src/engine/metadata-modules/field-metadata/field-metadata.service.ts b/packages/twenty-server/src/engine/metadata-modules/field-metadata/field-metadata.service.ts
index d32c7994c..fe8175773 100644
--- a/packages/twenty-server/src/engine/metadata-modules/field-metadata/field-metadata.service.ts
+++ b/packages/twenty-server/src/engine/metadata-modules/field-metadata/field-metadata.service.ts
@@ -19,6 +19,7 @@ import {
   FieldMetadataException,
   FieldMetadataExceptionCode,
 } from 'src/engine/metadata-modules/field-metadata/field-metadata.exception';
+import { assertDoesNotNullifyDefaultValueForNonNullableField } from 'src/engine/metadata-modules/field-metadata/utils/assert-does-not-nullify-default-value-for-non-nullable-field.util';
 import { computeColumnName } from 'src/engine/metadata-modules/field-metadata/utils/compute-column-name.util';
 import { generateNullable } from 'src/engine/metadata-modules/field-metadata/utils/generate-nullable';
 import { ObjectMetadataService } from 'src/engine/metadata-modules/object-metadata/object-metadata.service';
@@ -310,6 +311,11 @@ export class FieldMetadataService extends TypeOrmQueryService<FieldMetadataEntit
 
       assertMutationNotOnRemoteObject(objectMetadata);
 
+      assertDoesNotNullifyDefaultValueForNonNullableField({
+        isNullable: existingFieldMetadata.isNullable,
+        defaultValueFromUpdate: fieldMetadataInput.defaultValue,
+      });
+
       if (
         objectMetadata.labelIdentifierFieldMetadataId ===
           existingFieldMetadata.id &&
diff --git a/packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/__tests__/assert-does-not-nullify-default-value-for-non-nullable-field.spec.ts b/packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/__tests__/assert-does-not-nullify-default-value-for-non-nullable-field.spec.ts
new file mode 100644
index 000000000..04ecc1033
--- /dev/null
+++ b/packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/__tests__/assert-does-not-nullify-default-value-for-non-nullable-field.spec.ts
@@ -0,0 +1,38 @@
+import { assertDoesNotNullifyDefaultValueForNonNullableField } from 'src/engine/metadata-modules/field-metadata/utils/assert-does-not-nullify-default-value-for-non-nullable-field.util';
+
+describe('assertDoesNotNullifyDefaultValueForNonNullableField', () => {
+  it('should not throw if default value is set to null and field is nullable', () => {
+    expect(() =>
+      assertDoesNotNullifyDefaultValueForNonNullableField({
+        isNullable: true,
+        defaultValueFromUpdate: null,
+      }),
+    ).not.toThrow();
+  });
+
+  it('should not throw if default value is undefined and field is non nullable', () => {
+    expect(() =>
+      assertDoesNotNullifyDefaultValueForNonNullableField({
+        isNullable: false,
+      }),
+    ).not.toThrow();
+  });
+
+  it('should not throw if default value is not set to null and field is non nullable', () => {
+    expect(() =>
+      assertDoesNotNullifyDefaultValueForNonNullableField({
+        isNullable: false,
+        defaultValueFromUpdate: 'new default value',
+      }),
+    ).not.toThrow();
+  });
+
+  it('should throw if default value is set to null and field is non nullable', () => {
+    expect(() =>
+      assertDoesNotNullifyDefaultValueForNonNullableField({
+        isNullable: false,
+        defaultValueFromUpdate: null,
+      }),
+    ).toThrow();
+  });
+});
diff --git a/packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/assert-does-not-nullify-default-value-for-non-nullable-field.util.ts b/packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/assert-does-not-nullify-default-value-for-non-nullable-field.util.ts
new file mode 100644
index 000000000..7fcd625b8
--- /dev/null
+++ b/packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/assert-does-not-nullify-default-value-for-non-nullable-field.util.ts
@@ -0,0 +1,19 @@
+import {
+  FieldMetadataException,
+  FieldMetadataExceptionCode,
+} from 'src/engine/metadata-modules/field-metadata/field-metadata.exception';
+
+export const assertDoesNotNullifyDefaultValueForNonNullableField = ({
+  isNullable,
+  defaultValueFromUpdate,
+}: {
+  isNullable: boolean;
+  defaultValueFromUpdate?: any;
+}) => {
+  if (!isNullable && defaultValueFromUpdate === null) {
+    throw new FieldMetadataException(
+      'Default value cannot be nullified for non-nullable field',
+      FieldMetadataExceptionCode.INVALID_FIELD_INPUT,
+    );
+  }
+};