https://devzone.nordicsemi.com/f/nordic-q-a/8864/how-to-get-rid-of-the-do-not-enter-sign-after-sdk-upgradeAfter I upgraded to SDK9.0. The old files still left in the project folder. I had this situation last time. What I did was recreated the project. But is there a better way to fix this? Screen shot attached.en-USTelligent Community 13Tue, 25 Aug 2015 15:26:20 GMThttps://devzone.nordicsemi.com/thread/32597?ContentTypeID=1Tue, 25 Aug 2015 15:26:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e45b083f-eb1f-42a2-8820-71ef5024fb97Paul<p>OK, I figured it out. I have multiple targets, but I forgot to change the device for one of them. :-) All good now.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/32596?ContentTypeID=1Tue, 25 Aug 2015 15:16:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f0bb4642-1d76-4c54-8856-82f9c9bc3e40Paul<p>Thanks Aryan, but I wasn&#39;t providing correct information. it was after I changed device from xxAA to xxAC. I checked the project folder xxAA and xxAC both exist.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/32595?ContentTypeID=1Tue, 25 Aug 2015 07:14:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:34e5a8ca-7a46-48c5-bb88-845dc0bdd123Susheel Nuguru<p>After the upgrade when you select the &quot;Manage Run-Time environment&quot;</p> <p><img src="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/7851.Capture1.PNG" alt="image description" /></p> <p>and de-select the old version of the files which are non existent. Atleast this way you do not have to re-create the project.</p><div style="clear:both;"></div>