Issue with AWS ResourceConflictException

dealing with multiple logins using AWS cognito, meanwhile getting :

Error is [Error Domain=com.amazonaws.AWSCognitoIdentityErrorDomain Code=10 "The operation couldn’t be completed. (com.amazonaws.AWSCognitoIdentityErrorDomain error 10.)" UserInfo=0x7fca79661b10 {__type=ResourceConflictException, message=Cannot merge these identities.}]

My guess is : One cognitoID has facebook1, twiiter1 as linked logins, now second cognitoID tries to connect facebook2 which works but then tries to connect with twiiter1, in this case both cognito expected to be merged but there is conflict between facebook1 and facebook2 so getting ResourceConflictException . what would be possible fix to handle such case?