GPS for Yaw doesn't work

I use dual GPS with two CUAV C-RTK 9Ps in my drone, and also use GPS for YAW. The drone worked fine on its last flight with no issues.
But today, Yaw is not found with “PreArm: GPS[2] yaw not available” message. There is no difference between the state of the drone from the last flight and the state of the drone now.
I tried to solve it on my own, but I couldn’t. If there is one thing I noticed, the “ekf3 imu0/1 yaw aligned” message that was confirmed on the last flight was not confirmed today.
I need help. I’ll upload the t-log.
thank you.

2022-06-09 (551.4 KB)
2022-06-13 (639.6 KB)