Two ways to fix it
Option	What happens	Effort
A. Make tickets customer-level (recommended)	The ticket form lists the customers the technician works on (the same list as their "Customers" menu). The project becomes optional.	Small code change. Matches the rest of the journey.
B. Keep tickets project-level	Every customer must have a quotation converted to a project, and the technician added to the project team, before any ticket	No code change, but extra manual steps for every customer