title: getting Session state protection violation error for a hidden item that is being set with computation before header - Oracle APEX
body: <p>I am trying to set the label of an item dynamically using the value of an other hidden item in the same page.</p>
  
  <p>I created a computation for the hidden item in the page and set the value of the item as the dynamic label - &amp;P613_EMPLOYEE_TYPE_LABEL.</p>
  
  <p>But I am getting this error</p>
  
  <pre><code>Session state protection violation: This may be caused by manual alteration of protected page item P613_EMPLOYEE_TYPE_LABEL.   
  
  Technical Info (only visible for developers)
  
  is_internal_error: true
  apex_error_code: APEX.SESSION_STATE.ITEM_VALUE_PROTECTION
  component.type: APEX_APPLICATION_PAGES
  component.id: 149000000613
  component.name: DETAILS OF EMPLOYEE
  error_backtrace:
  ----- PL/SQL Call Stack -----
  object      line  object
  handle    number  name
  0x263d96750       935  package body APEX_050100.WWV_FLOW_ERROR
  0x263d96750      1003  package body APEX_050100.WWV_FLOW_ERROR
  0x263d96750      1395  package body APEX_050100.WWV_FLOW_ERROR
  0x26ac006a8      3116  package body APEX_050100.WWV_FLOW
  0x26ac006a8      5533  package body APEX_050100.WWV_FLOW
  0x265a48af8         2  anonymous block
  </code></pre>
  
  <p>But I have set the session state protection fo the item to 'unrestricted'</p>
  
  <p>page settings 
  <a href="https://i.stack.imgur.com/ztXJm.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ztXJm.png" alt="page settings"></a>  </p>
  
  <p>computation<br>
  <a href="https://i.stack.imgur.com/zjRCQ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/zjRCQ.png" alt="computation"></a>  </p>
  
  <p>component settings<br>
  <a href="https://i.stack.imgur.com/Vl9d3.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Vl9d3.png" alt="component settings"></a>   </p>