diff --git a/docs/en_US/release_notes_4_6.rst b/docs/en_US/release_notes_4_6.rst
index 39c1775ca..20a322b08 100644
--- a/docs/en_US/release_notes_4_6.rst
+++ b/docs/en_US/release_notes_4_6.rst
@@ -24,5 +24,6 @@ Bug fixes
 | `Bug #4121 <https://redmine.postgresql.org/issues/4121>`_ - Fixed alignment issue of columns in definition section of Index node.
 | `Bug #4134 <https://redmine.postgresql.org/issues/4134>`_ - Fixed 'Location cannot be empty' error when open Tablespace properties.
 | `Bug #4138 <https://redmine.postgresql.org/issues/4138>`_ - Fix an issue where the dropdown becomes misaligned/displaced.
+| `Bug #4160 <https://redmine.postgresql.org/issues/4160>`_ - Fixed 'Increment value cannot be empty' error for existing tables.
 | `Bug #4161 <https://redmine.postgresql.org/issues/4161>`_ - Ensure that parameters of procedures for EPAS server 10 and below should be set/reset properly.
 | `Bug #4182 <https://redmine.postgresql.org/issues/4182>`_ - Ensure sanity of the permissions on the storage and session directories and the config database.
\ No newline at end of file
diff --git a/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/columns/static/js/column.js b/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/columns/static/js/column.js
index a5bd7804f..74b37042a 100644
--- a/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/columns/static/js/column.js
+++ b/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/columns/static/js/column.js
@@ -193,6 +193,15 @@ define('pgadmin.node.column', [
           seqcache: undefined,
           seqcycle: undefined,
         },
+        initialize: function(attrs) {
+          if (_.size(attrs) !== 0) {
+            this.set({
+              'old_attidentity': this.get('attidentity'),
+            }, {silent: true});
+          }
+          pgBrowser.Node.Model.prototype.initialize.apply(this, arguments);
+
+        },
         schema: [{
           id: 'name', label: gettext('Name'), cell: 'string',
           type: 'text', disabled: 'inSchemaWithColumnCheck',
@@ -658,7 +667,8 @@ define('pgadmin.node.column', [
             maximum = this.get('seqmax'),
             start = this.get('seqstart');
 
-          if (!this.isNew()) {
+          if (!this.isNew() && (this.get('old_attidentity') == 'a' || this.get('old_attidentity') == 'd') &&
+          (this.get('attidentity') == 'a' || this.get('attidentity') == 'd')) {
             if (_.isUndefined(this.get('seqincrement'))
               || String(this.get('seqincrement')).replace(/^\s+|\s+$/g, '') == '') {
               msg = gettext('Increment value cannot be empty.');