phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'd7ca39f6803d8ed5bbc5b049bed2bb4f' 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 ('d7ca39f6803d8ed5bbc5b049bed2bb4f', -1, 1770105123, 1770105123, 'd849d8b9', 1, 0, 0)

Line : 187
File : sessions.php