phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('79e7e3e4d722a0fc3da89736b146dcf8', -1, 1715152872, 1715152872, '1275e3c2', 4, 0, 0)

Line : 189
File : sessions.php