Scenario: 

How to set sales invoice unable edit stock name 2? Sometime user accidentally edited or deleted stock name 2 

Solution:

1) Login user with full access

2) Go to Customization Centre, can refer below link for details

https://support.qne.com.my/support/solutions/articles/81000383848-how-to-access-customization-centre 

3) Go to Views > search for SalesInvoices_SalesInvoiceDetailsCollection_ListView > Columns > Stock.StockName2 

4) At right hand side, AllowEdit change to False > Save > Close

5) Logout and login system again, check at sales invoice stock name 2 column, unable to edit now

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Refer attachment for details