DS not recognizing credentials after OS upgrade ( 389-ds 1.3.10.2-16)

[Ghiurea, Isabella]

HI

we are running 2  DS in multi master replication , this week the Sysadmin decided to 
apply OS patches updates on both servers,  after patches applied one  DS is working fine 
with no issues  and one  is back online but we can not access DS or   run ldap search or
import , no errors just plain "invalid credentials" ,, any help where to look
for ?

here is  the version info:

OS on both hosts :Linux  3.10.0-1160.76.1.el7.x86_64 #1 SMP Wed Aug 10 16:21:17 UTC 2022
x86_64 x86_64 x86_64 GNU/Linux


####Before OS patches both of each servers were running :

389-ds-base-1.3.10.2-14.el7_9.x86_64
389-ds-console-1.2.16-1.el7.noarch
389-ds-base-libs-1.3.10.2-14.el7_9.x86_64
############################################################?

#####After OS patches running:

389-ds-base-1.3.10.2-16.el7_9.x86_64
389-ds-base-libs-1.3.10.2-16.el7_9.x86_64
389-ds-console-1.2.16-1.el7.noarch