We migrated PROD DB (16.01) on DEV env and upgraded to 16.1.0. Then we tried to implement the SSO (DEV running before upgrade) but we are not able to import metadata file, that worked perfectly before.
Release : 16.1.0
Attribute code: sso_ser_url (api alias ssoServiceURL ; CMN_SEC_SAML_CONFIGS column SSO_SER_URL) is populated internally based on the metadata xml. Taking a fresh export of the SAML metadata from IDP, and importing back to clarity.