solution of your design change for the specified store intersects with another one, please specify another date range.

solution of your design change for the specified store intersects with another one, please specify another date range. 

Follow these steps to get the solution:
Go to your phpMyAdmin page.

Open the phpMyAdmin portal from your hosting panel.

Select the database(magento)

Select the database where you’ve stored your magento data.

Find the table(Design Changes).

Find out the table named “design_change”. If you set any prefix while installing magento then the name of the table will be “yourprefix_design_change”.

Delete the records
Do not drop table.just delete all records.Click on GO