S4 identification(BUT0ID ) is getting deleted during C4C replication.

[praveenisu]

Dear Team, 

we have one identification type in S4 for which there is no mapping defined from C4C. so this identification type never replicated to C4C. for the same customer, if i go to c4c and change any attribute ( like first name, last name), then that replication message from C4C, deleting the identification type in S4. 
how to prevent this deletion? we need this identification in S4 but not in C4C. however any change in C4C is deleting the same from S4. Can you please help?

[praveenisu]

Dear Team, I found the reason that C4C does not have that identification type configured. So whenever replication is happening identification getting deleted. to solve the issue, i excluded the entry in DRFF identification type filter 98699. once I maintained, it started working meaning deletion is not happening any more.