Can't import confluence space

[Vitali]

Hi! I've exported confluence space from the previous project and try to import XML in a new project, but can't do it: the 'A space with key CO already exists' mistake appears, although I can't see an existing space. Could you help me to deal with this issue? 

[Andy Gladstone]

@Vitali welcome to the Atlassian Community.

Space Keys must be unique in a Confluence Site. If you are importing a space from another site, but cannot view all of the spaces in the target site to determine whether there may be a conflict, I suggest you go to the site you are importing and change the key to something VERY unique before exporting. When you import into the target site you can then change the key to something more in line with the actual purpose of the space.

For example, if your space key is CO because the space name is Company, you may want to update the key to COMPANY prior to exporting and then once the space is imported you can update the key through trial and error.

https://support.atlassian.com/confluence-cloud/docs/choose-a-space-key/

Good luck!