Price prediction build model issue

Hi, as document guides, I use the price prediction,when train data, errors as below
Inferring Columns ...
Creating Data loader ...
Loading data ...
Exploring multiple ML algorithms and settings to find you the best model for ML task: regression
For further learning check: https://aka.ms/mlnet-cli
| Trainer RSquared Absolute-loss Squared-loss RMS-loss Duration #Iteration |
[Source=AutoML, Kind=Trace] Channel started
Exception occured while exploring pipelines:
Provided label column 'vendor_id' was of type String, but only type Single is allowed.
System.ArgumentException: Provided label column 'vendor_id' was of type String, but only type Single is allowed.
at Microsoft.ML.CLI.Program.<>c__DisplayClass1_0.b__0(NewCommandSettings options)
at Microsoft.ML.CLI.CodeGenerator.CodeGenerationHelper.GenerateCode()
Please see the log file for more info.