I added a store inside the admin panel but there is a database error after creating it. When I check the database, the store is inside it.

Error Number: 1055

Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'stadapp_db.category.name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

SELECT category.name as category_name, store.* FROM `store` JOIN `category` ON `category`.`id_category`=`store`.`category_id` WHERE `store`.`id_store` = 3 GROUP BY `store`.`id_store` ORDER BY `store`.`id_store` DESC LIMIT 20

Filename: modules/store/models/Store_model.php

Line Number: 601

Solved, was mysql problem.