phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '81eb57918ebe9ddbd299dc21527f20e3' 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 ('81eb57918ebe9ddbd299dc21527f20e3', -1, 1767402180, 1767402180, 'd849d819', -9, 0, 0)

Line : 187
File : sessions.php