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 ('79e34dd2d8628d247fac1d89d9a58875', -1, 1713404803, 1713404803, '1275a250', -10, 0, 0)

Line : 187
File : sessions.php