phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9f51c9caf9b36d557df97651c87c2d14' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9f51c9caf9b36d557df97651c87c2d14', -1, 1715844309, 1715844309, '1276fc57', -4, 0, 0)

Line : 187
File : sessions.php