NOTE: Test on MySQL 8.x (if possible).
- login to the Admin Console
- go to the Website & Content → Structure & Data → Products section
- create a Type=Service product + Status=Active + Price=15.00 product
- if the product price wasn't saved, then try editing that product -> specifying a price -> saving it again
- go to the E-commerce → Orders section
- switch to the Incomplete tab
- create a new incomplete order (visit all tabs and fill all required fields) with the above-created product
- on the Incomplete tab:
- select the newly created sales order
- press the Place Order toolbar button
- confirm that no SQL error has happened
- confirm that a newly created sales order was moved into the Processed status