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 ('3ff27ae40d5b055b850a0e4f4b5eb71c', -1, 1469843487, 1469843487, '36c46591', -1, 0, 0)

Line : 187
File : sessions.php