Why are my sacral and solar plexus chakras linked?

I've been doing both my solar plexus and sacral chakras, both through journaling and guided meditations. The weird part is that if one of them feels blocked, the other one also shuts down. It's like they're energetically connected. Emotionally, I'm numb, and creatively blocked at the same time. Is there a connection between the two chakras? How are my solar plexus and sacral chakras linked to each other?