@Neon_Duck
Just like any ETL tool sometimes even Talend component gets corrupted if we frequently make changes to that component.
As a simple fix to save time. Disable you're existing Component which is throwing an error (tDBInput__1) and add a new tDBInput component Fill the all the necessary details and then connect it it to tMap.
NOTE: After you use the new component row1 will change to row2. Make sure the same is updated in tMap.
Hopefully, this should solve your issue.