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 ('ffdc757df6cbc3453fdb8ad8538c996f', -1, 1713506481, 1713506481, '03913c95', -4, 0, 0)

Line : 187
File : sessions.php