hive 4.0.0-alpha2 external table locks

[Wojtek Meler]

I've enabled external tables locking with  issues.apache.org [HIVE-26258] 
Provide an option for enable locking of external tables - ASF JIRA (apache.org) 
 but still locking with HQL is not posible:   
org.apache.hadoop.hive.ql.metadata.HiveException: Current transaction manager 
does not support explicit lock requests.  Transaction manager:   
org.apache.hadoop.hive.ql.lockmgr.DbTxnManager   How to lock external table 
partition in hive4 to perform any maintenance on it?    Regards,  Wojtek