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 ('bf11bae4eb5bdb1860a0e0233615c753', -1, 1713582398, 1713582398, '038668ad', -7, 0, 0)

Line : 187
File : sessions.php