Cause of the message

When performing a time series prediction in “time series prediction mode”, the time interval of the time included in the time information variable of the specified variable to be predicted must be kept as constant as possible.
This message is displayed if the timestamp in the time information variable of the variable you want to predict is re-ordered over time and long periods of missing data is detected.

Solution

Check the data contained in the time information variable of the variable you want to predict, collect the data of the place where the time interval is blank, and add it to the prediction model creation (training) data. Or, remove the previous data from the prediction model creation (training) data where the time interval is blank. For information on how to create training and prediction data for use in the time-series prediction mode, see also “Dataset for regression (time series prediction mode)”.