Note: This description is specific to Cisco but applies to Aruba also (ArubaControllerApp).
In a scenario where you want to not have Access Points discovered on an individual WLC you need to set the “enableAPDisc” attribute value to “No” on
the Cisco_LWAPP_App associated to the WLC.
Note: After setting this attribute to “No” make sure to NOT run a discovery from the WLC Manager as this will always set the “enableAPDisc” attribute
value to “Yes” on the Cisco_LWAPP_App for all WLCs
Access Point models are still being created after setting the enableAPDisc to "No" on WLC models in Spectrum
Running a discovery from the WLC Manager runs a discovery on all WLC and also sets the enableAPDisc on associated Cisco_LWAPP_App models back to “Yes”.
Check if enableAPDisc has been set to “Yes” on the WLCs associated application model and make sure to not run the WLC Manager discovery after setting this attribute to “No”.
If you don't need any AP being discovered, another option is to set to No the
VNM Information tab > Autodiscovery Control > Modeling and Protocol Options > Create Wireless Access Points
How does the WLC Manager discovery in Spectrum work ?
https://knowledge.broadcom.com/external/article?articleId=106015