diff --git a/models/custom_migrations.go b/models/custom_migrations.go
index ec0e5f75e..fe40fdf13 100644
--- a/models/custom_migrations.go
+++ b/models/custom_migrations.go
@@ -23,7 +23,8 @@ var customMigrations = []CustomMigration{
 
 var customMigrationsStatic = []CustomMigrationStatic{
 	{"Alter user static table field type  ", alterUserStaticTable},
-	{"Delete zuzhi user history data ", deleteNotDisplayUser},
+	{"Delete organization user history data ", deleteNotDisplayUser},
+	{"update issue_fixed_rate to 1 if num_issues is 0 ", updateIssueFixedRate},
 }
 
 func MigrateCustom(x *xorm.Engine) {
@@ -83,3 +84,9 @@ func deleteNotDisplayUser(x *xorm.Engine, static *xorm.Engine) error {
 
 	return nil
 }
+
+func updateIssueFixedRate(x *xorm.Engine, static *xorm.Engine) error {
+	updateSQL := "update  repo_statistic  set issue_fixed_rate=1.0 where num_issues=0"
+	_, err := static.Exec(updateSQL)
+	return err
+}