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 ('8dd74fe9fb07b325b7577f1724a7a189', -1, 1508646779, 1508646779, '171456b1', 18, 0, 0)

Line : 187
File : sessions.php