Requesting clarification in your license

[cloudcompute]

We promise that we will not enforce the copyleft provisions in AGPL v3.0 against you if your application (a) does not
link to Focalboard directly, but exclusively uses Focalboard's Admin Tools and Configuration Files, and
(b) you have not modified, added to or adapted the source code of Focalboard in a way that results in the creation of
a “modified version” or “work based on” Focalboard as these terms are defined in the AGPL v3.0 license.

If I take some portions of the backend code and modify it to produce an application that is not similar to Focalboard and/or Mattermost, for example use this code to create a B2B application. Is it allowed to do so?

Thanks