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You are viewing the documentation of TeamCity 9.x, which is not the most recently released version of TeamCity.
View this page in TeamCity 2018.1 documentation or refer to the listing to choose the documentation corresponding to your TeamCity version.

 

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maintenancepageUsers
maintenancepageUsers

If on the TeamCity startup you see the TeamCity Maintenance page on the TeamCity startup, that means the this TeamCity instance requires technical maintenance which for . For security reasons it is to be performed by a system administrator who has access to the computer where the TeamCity server is installed. In most cases this page appears if the data format doesn't correspond to the required format; for example, during upgrade Upgrade TeamCity will display this page before converting the data to the a newer format.
If you do not have access to the computer where TeamCity is installed, inform your system administrator that TeamCity requires technical maintenance.

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maintenancepageAdmins
maintenancepageAdmins

After you have provided this token, you can review the details on what kind of maintenance is required. The need in technical maintenance may be caused, for example, by one of the following:

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dataUpgrade
dataUpgrade

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(warning) If you haven't backed your data up, do it at this point. Once TeamCity converts the data, downgrade won't be possible. If you need to return to an earlier TeamCity version, you will be able to do so that only by restoring the data from a corresponding backup. Please refer to the TeamCity Data Backup section for instructions.
When you are sure you have your data backed up, click Upgrade.

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