diff --git a/installer/data/mysql/atomicupdate/bug_20777_accountlines_dispute.perl b/installer/data/mysql/atomicupdate/bug_20777_accountlines_dispute.perl
new file mode 100644
index 0000000000..4317603ea3
--- /dev/null
+++ b/installer/data/mysql/atomicupdate/bug_20777_accountlines_dispute.perl
@@ -0,0 +1,13 @@
+$DBversion = 'XXX';
+if( CheckVersion( $DBversion ) ) {
+
+    if ( column_exists( 'accountlines', 'dispute' ) ) {
+        $dbh->do(q{
+            ALTER TABLE `accountlines`
+                DROP COLUMN `dispute`
+        });
+    }
+
+    SetVersion( $DBversion );
+    print "Upgrade to $DBversion done (Bug 20777 - Remove unused field accountlines.dispute)\n";
+}
diff --git a/installer/data/mysql/kohastructure.sql b/installer/data/mysql/kohastructure.sql
index 14da53ba96..9e6ebfdea8 100644
--- a/installer/data/mysql/kohastructure.sql
+++ b/installer/data/mysql/kohastructure.sql
@@ -2693,7 +2693,6 @@ CREATE TABLE `accountlines` (
   `date` date default NULL,
   `amount` decimal(28,6) default NULL,
   `description` LONGTEXT,
-  `dispute` LONGTEXT,
   `accounttype` varchar(5) default NULL,
   `payment_type` varchar(80) default NULL, -- optional authorised value PAYMENT_TYPE
   `amountoutstanding` decimal(28,6) default NULL,