Inverter Coolant Change Frequency Question

Hello, I'm sorry if this is a stupid question. At some point the stealership recommended an inverter coolant change way earlier than necessary on my 2013 Prius C Four, and I agreed at the time.

Manual says initial change is at 15 years / 150,000 miles. I had this done around 60,000 / 60 months ago.

I'm just concerned because the manual states subsequent replacements should be every 50,000 / 60 months.

Am I consigned to another coolant change early due to this? I'm "up" for it in terms of a subsequent replacement after the first, but still behind where the initial replacement should have occurred.