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 ('f3c97b77de0dbff282be8c8f6f2e0698', -1, 1713589612, 1713589612, '12745548', -4, 0, 0)

Line : 187
File : sessions.php