Output Coefficients returns two coefficients for the same interaction term

[GiacoL]

When I run the code, I get two coefficcient for the interaction term between covariates for and 4 and 5. It happens also with other data. What I have noticed so far:

• one of the two estimated coefficients is always zero (or an extremely low value)
• when this problem occurs, it occurs always with the interaction term at the bottom of coefficents list.

Attached you can find a screenshot of the output and a script with the code.
I hope it helps.

Best,
Giacomo

R.version used:
platform x86_64-w64-mingw32
arch x86_64
os mingw32
crt ucrt
system x86_64, mingw32
status
major 4
minor 2.2
year 2022
month 10
day 31
svn rev 83211
language R
version.string R version 4.2.2 (2022-10-31 ucrt)
nickname Innocent and Trusting

Code_Sprintr.txt