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 ('687a653ed18d3e78fbdd5edf516751d7', -1, 1524497651, 1524497651, '36c42f91', 15, 0, 0)

Line : 187
File : sessions.php