phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('778e39b57451f1dddfa47b254c394ecd', -1, 1713579438, 1713579438, '038a7a04', -1, 0, 0)

Line : 187
File : sessions.php