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this is AWS telling you that there's already an EC2 instance with this IP address in use, this isn't a Pulumi error

Hi <@UCWG26BH7> thx for reply, any advice how to solve it, i try to change instance type, and issue command “pulumi up” and getting this error, or should i always destroy infrastructure before update it?

If you're setting a fixed IP address yourself, then you'll need to set the _deleteBeforeReplace_ opt to true. If you're not, then you'll need to find out why there's a clash; normally, this wouldn't happen.

Pulumi intentionally creates replacement resources before deleting the original ones (more info here: <https://www.pulumi.com/docs/troubleshooting/faq/#why-do-resource-names-have-random-hex-character-suffixes>). So for resources that have properties that must be unique (such as IP addresses on a single subnet), you either have to change the behaviour, or change your logic.

<@U012UJTT55M> solve by deleteBeforeReplace, thx a lot :slightly_smiling_face: