phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b61d291ce6920f12923252511fc79c56' 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 ('b61d291ce6920f12923252511fc79c56', -1, 1768548148, 1768548148, 'd849d87e', -4, 0, 0)

Line : 215
File : sessions.php