Act_id_priv_mapping not adding user of group record

When i remove postgresql db source from my configuration and add only LDAP configuration then i am getting following error while adding user to group:

org.h2.jdbc.JdbcSQLIntegrityConstraintViolationException: Referential integrity constraint violation: “ACT_FK_MEMB_GROUP: PUBLIC.ACT_ID_MEMBERSHIP FOREIGN KEY(GROUP_ID_) REFERENCES PUBLIC.ACT_ID_GROUP(ID_) (‘501’)”; SQL statement:
insert into ACT_ID_MEMBERSHIP (USER_ID_, GROUP_ID_)
values (
?,
?
) [23506-199]

I am not using h2 in any of configuration. Its helpfull if you add sample docker configuration with LDAP to flowable-engine/docker/config at main · flowable/flowable-engine · GitHub