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 ('c25b234c6a1ef76ac12353f6ec173b7c', -1, 1435860868, 1435860868, '36a7fc3e', -4, 0, 0)

Line : 172
File : sessions.php