phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '966a9afb15fd86da1b7e064ec0acba03' 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 ('966a9afb15fd86da1b7e064ec0acba03', -1, 1764978373, 1764978373, 'c0a8100c', -9, 0, 0)

Line : 187
File : sessions.php