phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '78b8672ee18a9e2a56eaf4a6de0ac8e8' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('78b8672ee18a9e2a56eaf4a6de0ac8e8', -1, 1781346322, 1781346322, 'd849d957', -4, 0, 0)

Line : 187
File : sessions.php