Spark not working subscription request

hello i have ejabberd + spark. im using ldap shared roster. but when i try to write to someone spark giving me “service-unvailable” error. Using PSI+ i can write successfully. how to fix please?

i can see this in spark log
rg.jivesoftware.smack.XMPPException$XMPPErrorException: XMPP error reply received from user@domain.net: XMPPError: subscription-required
but no subscription request on the other side