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 ('9deb995fb13a8a931a5c007d3dea0dba', -1, 1730420043, 1730420043, '0389b1b3', 32, 0, 0)

Line : 195
File : sessions.php