phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1c4b06336d3ba68d515c9cbc5a42cafd' for key 'PRIMARY'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('1c4b06336d3ba68d515c9cbc5a42cafd', -1, 1768151776, 1768151776, 'ac120002', 7, 0, 0)

Line : 187
File : sessions.php