phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '2a50f8c90384507e73617d1233780a7c' 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 ('2a50f8c90384507e73617d1233780a7c', -1, 1786904302, 1786904302, 'd849d908', 1, 0, 0)

Line : 187
File : sessions.php