[mavros_posix_sitl.launch] is neither a launch file in package [px4] nor is [px4] a launch file name

roslaunch px4 mavros_posix_sitl.launch

follows 2 small error.
One is Error [Converter.cc:151] Unable to convert from SDF version 1.7 to 1.6

https://answers.gazebosim.org//question/7691/unable-to-convert-from-sdf-version-15-to-14/

I solved it by editing sdf file version from 1.7 to 1.6

The other error is

[ERROR] [1674526819.464722103, 51.024000000]: TM : Time jump detected. Resetting time synchroniser.

There is warning about too many subscription

WARN  [logger] Too many subscriptions, failed to add: estimator_aid_src_ev_vel 5