phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '401a7f7da41b332b1d8548dc0a04c0ce' 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 ('401a7f7da41b332b1d8548dc0a04c0ce', -1, 1777609190, 1777609190, 'd849d92f', -9, 0, 0)

Line : 187
File : sessions.php