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 ('c32f47f95c5dde6b9a57c7e9fb7ff606', -1, 1713264631, 1713264631, '12d8bea7', -8, 0, 0)

Line : 187
File : sessions.php