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 ('c733411ae8bc2041a3c1f12e3d3a34cb', -1, 1711630122, 1711630122, '2cc1507e', -4, 0, 0)

Line : 187
File : sessions.php