diff --git a/packages/tools/src/SqlDumper.ts b/packages/tools/src/SqlDumper.ts
index 65d327c1b..768838681 100644
--- a/packages/tools/src/SqlDumper.ts
+++ b/packages/tools/src/SqlDumper.ts
@@ -606,7 +606,7 @@ export class SqlDumper implements AlterProcessor {
     this.putCmd('^drop %s %f', this.getSqlObjectSqlName(obj.objectTypeField), obj);
   }
 
-  fillPreloadedRows(table: NamedObjectInfo, oldRows: any[], newRows: any[], key: string[]) {
+  fillPreloadedRows(table: NamedObjectInfo, oldRows: any[], newRows: any[], key: string[], insertOnly: string[]) {
     let was = false;
     for (const row of newRows) {
       const old = oldRows?.find(r => key.every(col => r[col] == row[col]));
@@ -614,7 +614,7 @@ export class SqlDumper implements AlterProcessor {
       if (old) {
         const updated = [];
         for (const col of rowKeys) {
-          if (row[col] != old[col]) {
+          if (row[col] != old[col] && !insertOnly?.includes(col)) {
             updated.push(col);
           }
         }
diff --git a/packages/tools/src/alterPlan.ts b/packages/tools/src/alterPlan.ts
index 858138f89..dae56bf8a 100644
--- a/packages/tools/src/alterPlan.ts
+++ b/packages/tools/src/alterPlan.ts
@@ -93,6 +93,7 @@ interface AlterOperation_FillPreloadedRows {
   oldRows: any[];
   newRows: any[];
   key: string[];
+  insertOnly: string[];
 }
 
 type AlterOperation =
@@ -232,13 +233,14 @@ export class AlterPlan {
     this.recreates.tables += 1;
   }
 
-  fillPreloadedRows(table: NamedObjectInfo, oldRows: any[], newRows: any[], key: string[]) {
+  fillPreloadedRows(table: NamedObjectInfo, oldRows: any[], newRows: any[], key: string[], insertOnly: string[]) {
     this.operations.push({
       operationType: 'fillPreloadedRows',
       table,
       oldRows,
       newRows,
       key,
+      insertOnly,
     });
   }
 
@@ -565,7 +567,7 @@ export function runAlterOperation(op: AlterOperation, processor: AlterProcessor)
       processor.dropSqlObject(op.oldObject);
       break;
     case 'fillPreloadedRows':
-      processor.fillPreloadedRows(op.table, op.oldRows, op.newRows, op.key);
+      processor.fillPreloadedRows(op.table, op.oldRows, op.newRows, op.key, op.insertOnly);
       break;
     case 'recreateTable':
       {
diff --git a/packages/tools/src/database-info-alter-processor.ts b/packages/tools/src/database-info-alter-processor.ts
index d0e0fdaa4..046b04c08 100644
--- a/packages/tools/src/database-info-alter-processor.ts
+++ b/packages/tools/src/database-info-alter-processor.ts
@@ -116,9 +116,10 @@ export class DatabaseInfoAlterProcessor {
     throw new Error('recreateTable not implemented for DatabaseInfoAlterProcessor');
   }
 
-  fillPreloadedRows(table: NamedObjectInfo, oldRows: any[], newRows: any[], key: string[]) {
+  fillPreloadedRows(table: NamedObjectInfo, oldRows: any[], newRows: any[], key: string[], insertOnly: string[]) {
     const tableInfo = this.db.tables.find(x => x.pureName == table.pureName && x.schemaName == table.schemaName);
     tableInfo.preloadedRows = newRows;
     tableInfo.preloadedRowsKey = key;
+    tableInfo.preloadedRowsInsertOnly = insertOnly;
   }
 }
diff --git a/packages/tools/src/diffTools.ts b/packages/tools/src/diffTools.ts
index b7c218ab6..326a21a36 100644
--- a/packages/tools/src/diffTools.ts
+++ b/packages/tools/src/diffTools.ts
@@ -328,7 +328,7 @@ function createPairs(oldList, newList, additionalCondition = null) {
 function planTablePreload(plan: AlterPlan, oldTable: TableInfo, newTable: TableInfo) {
   const key = newTable.preloadedRowsKey || newTable.primaryKey?.columns?.map(x => x.columnName);
   if (newTable.preloadedRows?.length > 0 && key?.length > 0) {
-    plan.fillPreloadedRows(newTable, oldTable?.preloadedRows, newTable.preloadedRows, key);
+    plan.fillPreloadedRows(newTable, oldTable?.preloadedRows, newTable.preloadedRows, key, newTable.preloadedRowsInsertOnly);
   }
 }
 
diff --git a/packages/tools/src/yamlModelConv.ts b/packages/tools/src/yamlModelConv.ts
index ad1e2fff9..128122e76 100644
--- a/packages/tools/src/yamlModelConv.ts
+++ b/packages/tools/src/yamlModelConv.ts
@@ -24,6 +24,7 @@ export interface TableInfoYaml {
   primaryKey?: string[];
 
   insertKey?: string[];
+  insertOnly?: string[];
   data?: any[];
 }
 
@@ -124,6 +125,7 @@ export function tableInfoFromYaml(table: TableInfoYaml, allTables: TableInfoYaml
   }
   res.preloadedRows = table.data;
   res.preloadedRowsKey = table.insertKey;
+  res.preloadedRowsInsertOnly = table.insertOnly;
   return res;
 }
 
diff --git a/packages/types/alter-processor.d.ts b/packages/types/alter-processor.d.ts
index 25de4885d..3e5cd3cc3 100644
--- a/packages/types/alter-processor.d.ts
+++ b/packages/types/alter-processor.d.ts
@@ -15,5 +15,5 @@ export interface AlterProcessor {
   recreateTable(oldTable: TableInfo, newTable: TableInfo);
   createSqlObject(obj: SqlObjectInfo);
   dropSqlObject(obj: SqlObjectInfo);
-  fillPreloadedRows(table: NamedObjectInfo, oldRows: any[], newRows: any[], key: string[]);
+  fillPreloadedRows(table: NamedObjectInfo, oldRows: any[], newRows: any[], key: string[], insertOnly: string[]);
 }
diff --git a/packages/types/dbinfo.d.ts b/packages/types/dbinfo.d.ts
index 0ee59e73d..16a0aec58 100644
--- a/packages/types/dbinfo.d.ts
+++ b/packages/types/dbinfo.d.ts
@@ -80,6 +80,7 @@ export interface TableInfo extends DatabaseObjectInfo {
   checks?: CheckInfo[];
   preloadedRows?: any[];
   preloadedRowsKey?: string[];
+  preloadedRowsInsertOnly?: string[];
   __isDynamicStructure?: boolean;
 }