Steps to reproduce (*)

1. catalog>product>select the product
2. trying to change the quantity but facing error Tier prices data should be array, but actually other type is received

Expected result (*)

1. Quantity should be updated when i click save button from the backend

Actual result (*)

1. not able to save as it shows error “Tier prices data should be array, but actually other type is received”

Solution (*)

To check tier_price attribute_id from “eav_attribute” table, search
"SELECT * FROM eav_attribute WHERE attribute_code="tier_price"
Which is 92.

And then search entry for 91 attribute_id value from catalog_product_entity_decimal

SELECT * FROM catalog_product_entity_decimal WHERE attribute_id=92

And then delete the entry from the table.