Hello @Khalid9030 ,

current.insert() should be inserted only inside if loop where you will check if given record isNewRecord() else current.update() should run.

For Example - 

if(current.isNewRecord()){ //New Record which is not saved/created/inserted into the table yet.
current.insert();
}else{
current.update();
}

Let me know if it helps.

Thanks,

Shubham