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I work on a former app that I must update I get following message in build.gradle :

All com.android.support libraries must use the exact same version specification

I have found this post : All com.android.support libraries must use the exact same version specification

But I still get the message : enter image description here

And if I add reference to 26 version :

enter image description here

How can I solve this ?

Zoe
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anakin59490
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    this question had been asked and answered over and over. didn't you notice the `play-services` yet? – Martin Zeitler Apr 24 '19 at 22:08
  • @MartinZeitler Sorry, all the post I found (like the one I mention) don't talk about play-services....My question is clear and I have done research... So why negative vote !! Sorry not to be an expert ! – anakin59490 Apr 24 '19 at 22:16
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    that wasn't me. and that `12.0.1` version still could be removed. – Martin Zeitler Apr 24 '19 at 22:35

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