More than one user is set as vendor

[2dmaster]

/administrator/index.php?option=com_virtuemart&view=config

You are using single vendor mode, but it seems more than one user is set as vendor

i have only one user )) what is this error ? how to fix it ??

Momento more 

[GJC Web Design]

check the DB tables for any falsely marked as users

#__virtuemart_vmusers

user_is_vendor