[keycloak-user] Error linking users between realm

Hi, in my current scenario, i have an error in linking user between two Keycloak IDP i got two servers in 4.8.3.Final both in debug mode ./jboss-cli.sh --connect --command='/subsystem=logging/root-logger=ROOT:change-root-log-level(level=DEBUG)' ./jboss-cli.sh --connect --command='/subsystem=logging/logger=org.keycloak:write-attribute(name=level,value=DEBUG)' When i try to link a user, i get an error "An internal server error has occurred" after login on the second IDP In the log i see a : WARN [org.keycloak.events] (default task-3) type=LOGIN_ERROR, realmId=RedAirlines, clientId=null, userId=null, ipAddress=172.18.56.212, error=invalid_code Nothing in the log for the second IDP If i reload the webpage, i see the user is linked. However when i try an exchange token scenario, i got a "Not present cache item for key LoginFailureKey [ realmId=RedAirlines. userId=XXX" error which i'm pretty sure is related to the linking issue (because the token exchange scenario works, when i login my user using "another realm authentication") I can paste some more details if it can help, Thanks for any clue Amaury