SuccessFactors login error due IAS/IPS changes

Hello,

Currently our IPS configured as the following: We have SuccessFactors as the Source system and IAS as the Target system we login through SSO. In the IAS Target system I have changed in the Properties tab the username and password, which before I have set in the IAS 'Users and Authoriaztion' > 'Administrators' tab where I have added a System and in the 'Secrets' tab I configured a Client ID which is the Username and a Password which I have got after added a secret. After this I have added these credentials to the IPS (IAS) Target System User and Password field. Then I ran a read job and it deleted two user groups which was already defined in IAS, now no user can access to Succesfactor we got the following error message: 'You are currently not authorized to access it'. My question is that how can I fix this problem? Also I would like to understand why is the group deletion has happend? Any help will be much appreciated.

Regards,
Soma