phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9a1a2d77c9fe1e5909dbb3596ce05a9a' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9a1a2d77c9fe1e5909dbb3596ce05a9a', -1, 1770104213, 1770104213, '00000000', -9, 0, 0)

Line : 187
File : sessions.php