I then deleted the field that I had digitized, and it loaded the homepage again. So I tried to add an animal asset, which threw another error: PDOException: SQLSTATE[42803]: Grouping error: 7 ERROR: column "ss_log.timestamp" must appear in the GROUP BY clause or be used in an aggregate function LINE 1: SELECT ss_log.timestamp AS ss_logtimestamp, ss_log.id AS ss_... ^: SELECT ss_log.timestamp AS ss_logtimestamp, ss_log.id AS ss_logid, SUM(ss_fdffiv.field_farm_inventory_value_numerator / ss_fdffiv.field_farm_inventory_value_denominator) AS inventory FROM {log} ss_log INNER JOIN {field_data_field_farm_inventory} ss_fdffi ON ss_fdffi.entity_type = 'log' AND ss_fdffi.entity_id = ss_log.id AND ss_fdffi.deleted = 0 INNER JOIN {field_data_field_farm_inventory_asset} ss_fdffia ON ss_fdffia.entity_id = ss_fdffi.field_farm_inventory_value AND ss_fdffia.deleted = 0 INNER JOIN {field_data_field_farm_inventory_value} ss_fdffiv ON ss_fdffiv.entity_id = ss_fdffi.field_farm_inventory_value AND ss_fdffiv.deleted = 0 WHERE (ss_log.timestamp <= 1558772937) AND (ss_log.done = 1) AND (ss_fdffia.field_farm_inventory_asset_target_id = 1) ORDER BY ss_log.timestamp DESC, ss_log.id DESC LIMIT 1 OFFSET 0; Array ( ) in farm_inventory() (line 417 of /var/www/html/farmOS/profiles/farm/modules/farm/farm_inventory/farm_inventory.module).