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 ('9b10a9d4b32c24e79eb63f97e63f2450', -1, 1406077734, 1406077734, '36eb109f', 6, 0, 0)

Line : 186
File : sessions.php