In aggregated query without GROUP BY, expression #1 of SELECT list contains nonaggregated column 'assignment.Supplier.name'; this is incompatible with sql_mode=only_full_group_by code example
Example: which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));