Hi Ganesh
This is coming because of Repeat Delta Mechanism SAP has for InfoPackage.
Let's say your delta request did not come properly from source system and request failed . Then you can make it red and run the InfoPackage once again. System will ask whether you want to repeat last delta. If you say, yes. system will bring the last delta once again.
Source System keeps the last delta information ( in RSA7) till the request is green in target system.
I believe you have a 3.x data flow and as you have invalid characters , request did not get moved to target properly , resulting in Red status.
If you have 3.x flow, try to run the scheduler without making request green ( leave it in red status) ... I believe once the request is moved to target properly , request would automatically be green.
By the way, what is your data flow ? DataSource to Cube ? or DataSource to DSO?
Cheers
Anindya