Refresh errors

[Bliss]

Dear all,

I kept receiving the following errors when I refresh my dashboard, can someone advise and assist? 

I have many rows and columns and all entered by various parties, I cannot re-enter those data one by one, it will be time consuming...is there any way I can narrow down the column and row that is causing the error? 

Thank you. 

• Data source errorColumn '<pii>Date Period</pii>' in Table '<pii>Operations</pii>' contains blank values and this is not allowed for columns on the one side of a many-to-one relationship or for columns that are used as the primary key of a table. Table: Operations.
• Cluster URIWABI-SOUTH-EAST-ASIA-redirect.analysis.windows.net
• Activity ID4c627e06-9aca-43d6-88e1-6aafbea5e5e6
• Request IDa4eac2d7-6823-f27c-e147-72aeae895fe1
• Time2022-02-18 08:48:24Z

Best regards,

Bliss

[Icey]

Hi @Bliss ,

---

• Data source errorColumn '<pii>Date Period</pii>' in Table '<pii>Operations</pii>' contains blank values and this is not allowed for columns on the one side of a many-to-one relationship or for columns that are used as the primary key of a table. Table: Operations.

---

Based on the error message, please check table "Operations" and its column "Date Period" and remove blank values.

Best Regards,

Icey

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[amitchandak · Accepted solution]

@Bliss , You have a table on one side of one-to-many relationships. That is a blank or duplicate value. check that.

You can filter null in power query  and remove duplicate in power query, for the master table