How to reproduce:
1. Create a project
2. Window -> Package Management -> Package Manager
3. Click “+” and select “Create package”
4. Enter this string "555LoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsumLoremIpsum" into name and click the “Create”
5. Select the newly created package in the Package Manager window
6. Go to the "Inspector" window and click "Edit"
7. Observe the "Inspector" view

Expected results: No errors should be displayed in the "Inspector" window if the entered name was allowed during the package creation.
Actual results: The newly created package is displayed with the "Invalid Package Name" error.

Reproducible with: 6000.3.0a3, 6000.3.0b2

Can't test with: 6000.3.0a2 as this build has no package creation feature

Tested on (OS): M1 Max - Sequoia 15.6.1