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I'm trying to add / modify Config Var, when I try to save the change I get a message:

Item could not be updated:

Unknown Error. Please contact support.

Any ideas on what may be wrong?

B0rG
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    How are you "trying to save the change"? What's the name of the config var you're trying to set? Have you contacted support as suggested? – ChrisGPT was on strike Mar 22 '19 at 13:42
  • Any change is throwing error, for example, I'm trying to add MYAR with MYVAL value. – B0rG Mar 22 '19 at 13:44
  • I am running the "free" heroku, I don't see any way to contact support, there is no email, the "Create ticket" brings me to a list of common questions, but still no way to create a ticket. – B0rG Mar 22 '19 at 13:45
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    Again, _how_ are you trying to "save the change"? Are you doing it in the web panel? Via `heroku config:set`? What if you try to _read_ a variable, e.g. via `heroku config MYVAR`? It's unlikely that we're going to be able to help without more information. – ChrisGPT was on strike Mar 22 '19 at 14:00
  • I go to the dashboard and settings for my app: https://dashboard.heroku.com/apps/{myapp}/settings and do the "Releval config vars" and then I try to add or modify. – B0rG Mar 22 '19 at 14:11
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    It could be an authentication issue. Try deleting all of your cookies etc. for Heroku, logging in again, and trying to set the config var. – ChrisGPT was on strike Mar 22 '19 at 14:14
  • I have logged out, cleared cookies, even tried in an "Incognito" mode and still, I'm getting the error. – B0rG Mar 22 '19 at 14:17
  • Can you try destroying the app and recreating it? We're really just guessing at this point. Heroku support is likely in the best position to help you. – ChrisGPT was on strike Mar 22 '19 at 14:22
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    Chris, thanks for the attempts, must have been something wrong with the environment at work, when I have tried to update the variable on my phone, it went without any problems. Appreciate your help and time. Regards. – B0rG Mar 22 '19 at 15:46
  • B0rG Had the same problem ))) – Vova Mar 16 '20 at 14:35
  • Is your variable **DATABASE_URL**? If so, detach database first, as described in [this answer](https://stackoverflow.com/questions/35061914/how-to-change-database-url-for-a-heroku-application). – Mark Kahn Apr 02 '20 at 17:04

2 Answers2

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The below command solved my issue. Hope it works for others too.

Using Heroku CLI:

heroku config:set DB_PASSWORD=secret -a [heroku-app-name]

Bonus Points:

If Heroku CLI is not installed, you could use NPM to install it easily in [windows] system.

npm install -g heroku

heroku login
Naveen Kumar V
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Try to update in incognito mode or in different browser. It worked for me.

ANSHUMAN MISHRA
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