phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6a4b245ac9fcc5b7f0966a71d5c0f8ed' 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 ('6a4b245ac9fcc5b7f0966a71d5c0f8ed', -1, 1760044406, 1760044406, 'd849d8d6', -4, 0, 0)

Line : 187
File : sessions.php