Map CI related Blob fields to an alias table

Hi experts,

I have just upgraded my SM 9.41 app version from 9.40 to 9.41 using Applications Patch Manager. After the update, there is a pop-up message regarding Blob fields.

 

I tried to fix the Blob fields following the guide, https://softwaresupport.hpe.com/km/KM01653844/logical_name_solution.pdf?lang=en&cc=us&hpappid=202392_SSO_PRO_HPE Step 4: Map CI related Blob/Clob fields to an alias table but was stuck on step 3 at the Preparation phase.

When I create a new affected.services field and save it, I get an error as below:

However, no error if I create a new assets field following the guide. 

Can anyone advice why is it so?

Thank you