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 ('3bd32aae3c0401aad0dfd1577a9d98c8', -1, 1711665088, 1711665088, '2ccbdb75', -1, 0, 0)

Line : 187
File : sessions.php