PowerBI Dataset refresh error

[msimmonsmcse]

Just started getting a PBI dataset refreshe error today, after 2 successful syncs early in the morning. This is the error code I get from the service. Getting a similar error in PBI desktop when I try to refresh the dataset. This is happening to multiple tables.

• Underlying error code-2147467259
  Underlying error messageMicrosoft SQL: Conversion failed when converting the nvarchar value '36, 37' to data type int.
  Microsoft.Data.Mashup.ValueError.MessageConversion failed when converting the nvarchar value '36, 37' to data type int.

[lbendlin]

Welcome to the world of bad data.  What is your expectation - should Power BI use the first number, the second one, or should it reject the row (as it did) but maybe more gracefully?