title: How to disable the Editable ALV Grid in case of an incorrect entry?
body: <p>Whenever an invalid value is entered in an ALV Grid, how do I disable the other fields (grey out) in the grid and force the user to fix the incorrect field.</p>
  
  <p>I have tried adding protocol in DATA_CHANGED event. But protocol list only shows the error in popup. Editing is still possible and no fields are disabled.</p>
  
  <p>But how do I disable the other fields. Sample behavior as shown below:</p>
  
  <p><a href="https://i.stack.imgur.com/j7UQt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/j7UQt.png" alt="enter image description here"></a></p>
  
  <p>Here, the other fields are greyed out and the invalid entry is highlighted. Until the user fixes this error, he/she cannot proceed further.</p>