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 ('6c8584e326d67a00e0c936e9139bf5fa', -1, 1713415413, 1713415413, '030e8594', 0, 0, 0)

Line : 187
File : sessions.php