Unable to mark table as data table

[Bonny86]

I have a Calendar table with 2 columns.

In the table I have all datas from 1/1/2020 to 31/12/2022. I am unable to mark the table as data table. I can't understand where is the problem. In the past this worked.

 

[Anonymous · Accepted solution]

Hi, @Bonny86 

It's important to make sure that the calendar table meets the requirements to mark the table as a date table in Power BI. To mark a table as a date table, it must meet the following criteria:

Include unique values: Each date in the table should be unique, with no duplicate dates.
Doesn't contain null values: Make sure there are no null values in the date column.
Include consecutive date values: Dates should form a continuous sequence without any gaps.
Date/time data type consistency: If the data type of the column is Date/Time, all values should have the same timestamp.
In light of these conditions, I recommend that you first verify that your calendar meets these requirements.
Here are the relevant documents:

Set and use date tables in Power BI Desktop - Power BI | Microsoft Learn

How to Get Your Question Answered Quickly 

Best Regards

Yongkang Hua

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[Bonny86]

Hi @Anonymous I confirm that my table has all the requirements you mentioned. The strange thing is that this error started showing me a few weeks ago. I'll try uninstalling Power BI to see if anything happened with any updates. I have no idea what else it is, I was hoping someone had received a similar message

thanks