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 ('eab2773645f2d77d507e19c95509a8f0', -1, 1711630879, 1711630879, '0358fe32', 3, 0, 0)

Line : 187
File : sessions.php