phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ad4d76d2b05baf1a299f5173195c128e' 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 ('ad4d76d2b05baf1a299f5173195c128e', -1, 1760682373, 1760682373, 'd849d81d', -4, 0, 0)

Line : 187
File : sessions.php