1# UDMF Error Codes
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3> **NOTE**
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5> This topic describes only module-specific error codes. For details about universal error codes, see [Universal Error Codes](../errorcode-universal.md).
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7## 20400001 Settings Already Exist
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9**Error Message**
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11Settings already exist.
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13**Description**
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15The data to be set by **setAppShareOptions()** already exists.
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17**Possible Causes**
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19This error is reported when duplicate data is found.
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21**Solution**
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23To remove the existing settings, use [removeAppShareOptions](js-apis-data-unifiedDataChannel-sys.md#unifieddatachannelremoveappshareoptions12).
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