[SOLVED] OH3 Issue - "Model" Page endless loading - Maximum call stack size exceeded in app.js

Setup, Configuration and Use Migration
20

Developer Tool in Chrome says the following opening the Model page:

Uncaught (in promise) RangeError: Maximum call stack size exceeded
    at Ee.walk (app.js:7)
    at new Ee (app.js:7)
    at Te (app.js:7)
    at Ee.observeArray (app.js:7)
    at new Ee (app.js:7)
    at Te (app.js:7)
    at Object.set [as equipment] (app.js:7)
    at o.getChildren (app.js:27)
    at Array.forEach (<anonymous>)
    at o.getChildren (app.js:27)