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 ('f4ed6d808ee510e40abe7536b1639b14', -1, 1713416803, 1713416803, '12bf87e0', -4, 0, 0)

Line : 187
File : sessions.php