phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO BP_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('f3d33884655b3afcd59e0aed97cf57da', -1, 1762747863, 1762747863, '12610e57', -8, 0, 0)

Line : 193
File : sessions.php