diff --git a/lib/db_ido_pgsql/idopgsqlconnection.cpp b/lib/db_ido_pgsql/idopgsqlconnection.cpp
index 9eae07c78..c1b7295b1 100644
--- a/lib/db_ido_pgsql/idopgsqlconnection.cpp
+++ b/lib/db_ido_pgsql/idopgsqlconnection.cpp
@@ -600,7 +600,8 @@ bool IdoPgsqlConnection::FieldToEscapedString(const String& key, const Value& va
 		if (DbValue::IsObjectInsertID(value)) {
 			dbrefcol = GetInsertID(dbobjcol);
 
-			ASSERT(dbrefcol.IsValid());
+			if (!dbrefcol.IsValid())
+				return false;
 		} else {
 			dbrefcol = GetObjectID(dbobjcol);