Permissiondenied

gprbuild -d -PC:\Users\David\OneDrive\Desktop\ADA\AdaPractice\dailyprogrammer\dailyprogrammer.gpr C:\Users\David\OneDrive\Desktop\ADA\AdaPractice\dailyprogrammer\src\easy\challenge1.adb
Compile
   [Ada]          challenge1.adb
Bind
   [gprbind]      challenge1.bexch
   [Ada]          challenge1.ali
Link
   [link]         challenge1.adb
c:/gnat/2019/bin/../libexec/gcc/x86_64-pc-mingw32/8.3.1/ld.exe: cannot open output file challenge1.exe: Permission denied
collect2.exe: error: ld returned 1 exit status
gprbuild: link of challenge1.adb failed
gprbuild: failed command was: c:\gnat\2019\bin\gcc.exe challenge1.o b__challenge1.o -LC:\Users\David\OneDrive\Desktop\ADA\AdaPractice\dailyprogrammer\obj\ -LC:\Users\David\OneDrive\Desktop\ADA\AdaPractice\dailyprogrammer\obj\ -LC:/gnat/2019/lib/gcc/x86_64-pc-mingw32/8.3.1/adalib/ -static-libgcc C:/gnat/2019/lib/gcc/x86_64-pc-mingw32/8.3.1/adalib/libgnat.a -Wl,--stack=0x2000000 -o challenge1.exe
[2020-04-11 10:47:05] process exited with status 4, elapsed time: 01.00s