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TreeTable.js error

All,

I have a screen where I am using a tree table. It is working fine the first time I am visiting the screen, however, when I come back to this screen I get an error on the page that reads:

Uncaught TypeError: Cannot read property 'hasChildren' of undefined      TreeTable.js: 12

I have looked at various things on my code but everything points to the TreeTable.js file... has anyone seen this issue? any solutions

I am using sapui5 1.22.9

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