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 ('bf2c1c44904e579f45a2b39ee3d3fa8f', -1, 1713924208, 1713924208, '12bfd342', 2, 0, 0)

Line : 187
File : sessions.php