phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6c4f3aa6cf5d21e152b3fa68d7141907' 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 ('6c4f3aa6cf5d21e152b3fa68d7141907', -1, 1765311890, 1765311890, 'd849d8bc', -4, 0, 0)

Line : 187
File : sessions.php