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 ('c1b531768ff093b871379d2f006d7577', -1, 1713588063, 1713588063, '1277d5eb', -10, 0, 0)

Line : 187
File : sessions.php