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 ('6c3aa7941c713936b18c1eb6c8dbba6c', -1, 1505983865, 1505983865, '36c63408', 15, 0, 0)

Line : 187
File : sessions.php