phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a5e7d86a467c6d301bf1d7b78c36335a' 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 ('a5e7d86a467c6d301bf1d7b78c36335a', -1, 1776601335, 1776601335, 'd849d8ef', 1, 0, 0)

Line : 187
File : sessions.php