diskpart shows one partition as two different ones

I want to convert my hard disk from MBR to GTP and hence I’m using mbr2gpt tool. But, for it to work I can have maximum 4 partitions (max. 3 primary). I actually have only 4 partitions but diskpart is shows that I have 5. It is labeling the same partition as two separate partitions (extended and logical). How can I fix this?
Here’s a snip of my Disk Management, which shows that I actually only have 4 partitions.