Error during installing lhapdf6

[Es-said]

Dear MG5 teams,
i try to install lhapdf6 in madgraph using the command
MG5_aMC>install lhapdf6

all the time i face the issue

File "/home/said/Desktop/newversion/MG5_aMC_v3_4_1/HEPTools/HEPToolsInstallers/HEPToolInstaller.py", line 1574, in
finalize_installation(target_tool)
File "/home/said/Desktop/newversion/MG5_aMC_v3_4_1/HEPTools/HEPToolsInstallers/HEPToolInstaller.py", line 1250, in finalize_installation
os.symlink(os.path.relpath(path,pjoin(_prefix,'lib')),
FileExistsError: [Errno 17] File exists: '../lhapdf6_py3/lib/libLHAPDF.a' -> '/home/said/Desktop/newversion/MG5_aMC_v3_4_1/HEPTools/lib/libLHAPDF.a'
Command "install lhapdf6" interrupted with error:
InvalidCmd : Installation of lhapdf6_py3 failed.

also, i try to intall lhapdf in free folder following these commands
./configure --prefix=/path/for/installation
make
make install
i get this message from the first command
checking build system type... Invalid configuration /home/said/Desktop/lhapdf-insatll/install-LHA': machine /home/said/Desktop/lhapdf-insatll/install' not recognized
configure: error: /bin/bash config/config.sub /home/said/Desktop/lhapdf-insatll/install-LHA failed