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 ('7c1f9a2ac4cd0cf6b8e663c50b3767a4', -1, 1714022090, 1714022090, '03936708', -4, 0, 0)

Line : 187
File : sessions.php