phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a8e6326071b4751da8142adfd95c1f4c', -1, 1505854354, 1505854354, '36c61c72', 12, 0, 0)

Line : 187
File : sessions.php