diff --git a/apps/desktop/src/lib/dataGrid/dataGenerate.ts b/apps/desktop/src/lib/dataGrid/dataGenerate.ts
index a418ac4e07..433b8452ab 100644
--- a/apps/desktop/src/lib/dataGrid/dataGenerate.ts
+++ b/apps/desktop/src/lib/dataGrid/dataGenerate.ts
@@ -1204,7 +1204,7 @@ export function defaultGeneratorParams(_columnName: string, attrs: ColumnAttrs,
   const scale = attrs.numericScale ?? null;
   const charLen = attrs.characterMaximumLength ?? null;
   if (!attrs.isAutoIncrement && generatedDefaultValue(attrs.columnDefault, attrs.dataType) !== undefined) {
-    params.includeDefault = true;
+    params.includeDefault = false;
     params.defaultPercent = 100;
   }
 
@@ -1552,7 +1552,7 @@ export function generateValue(columnName: string, dataType: string, generatorKey
   if (params?.includeNull && params.nullPercent && Math.random() * 100 < params.nullPercent) return null;
   const defaultValue = generatedDefaultValue(columnDefault, dataType);
   if (defaultValue !== undefined) {
-    const includeDefault = params?.includeDefault ?? true;
+    const includeDefault = params?.includeDefault ?? false;
     const defaultPercent = params?.defaultPercent ?? 100;
     if (includeDefault && defaultPercent > 0 && Math.random() * 100 < defaultPercent) return defaultValue;
   }
diff --git a/packages/app-tests/dataGenerate.test.ts b/packages/app-tests/dataGenerate.test.ts
index c667d32c6f..3438a4ff44 100644
--- a/packages/app-tests/dataGenerate.test.ts
+++ b/packages/app-tests/dataGenerate.test.ts
@@ -11,7 +11,7 @@ test("recognizes Oracle-compatible NUMBER column types as numeric", () => {
   assert.equal(findGeneratorKey("value", "NUMBER CODE"), "text");
 });
 
-test("enables default values for columns with schema defaults", () => {
+test("keeps schema defaults optional for generated columns", () => {
   const params = defaultGeneratorParams(
     "status",
     {
@@ -21,10 +21,18 @@ test("enables default values for columns with schema defaults", () => {
     "text",
   );
 
-  assert.equal(params.includeDefault, true);
+  assert.equal(params.includeDefault, false);
   assert.equal(params.defaultPercent, 100);
 });
 
+test("does not let schema defaults override generated values unless enabled", () => {
+  const generated = generateValue("age", "bigint", "sequence", 4, { startValue: 1, increment: 1 }, "0");
+  const explicitDefault = generateValue("age", "bigint", "sequence", 4, { includeDefault: true, defaultPercent: 100 }, "0");
+
+  assert.equal(generated, 5);
+  assert.equal(explicitDefault, 0);
+});
+
 test("uses string column defaults instead of random generated values", () => {
   const result = generateTableData(
     {