3747839 - Failed to drop login Msg 11116 SAP ASE

Want to drop old login:
1)
drop login test_login
go
Msg 11116, Level 16, State 2:
Server 'YCZ', Line 1:
Cannot drop role or login 'test_login' because it does not exist in this
server. 
Check in syslogins table select suid,name,status from master..syslogins where name='test_login' and user exists:
 suid           status     name

 -----------  ------   --------------------                          
7               512      test_login

2) try to run:

sp_displaylogin test_login:
go
No login with the specified name exists.
(return status = 1) 

SAP Adaptive Server Enterprise 16 and 16.1

KBA , BC-DB-SYB , Business Suite on Adaptive Server Enterprise , Problem