nvidia-compute-G06 of CUDA repository can't be installed if libOpenCL1 package
is installed on the system due to a conflict. This was changed to
update-alternatives since sle15-sp1 and later removed completely, but 

1) nVidia is apparently still building the packages on a sle15-sp0 system
2) nVidia didn't update the changes, where this conflict was removed completely

@nVidia: Please update your package sources

https://github.com/openSUSE/nvidia-driver-G06/commit/2bb92f91d73160efb962d8d8b29f3fa7dfe57b26

diff --git a/nvidia-video-G06.spec b/nvidia-video-G06.spec
index 15dac5f..d951611 100644
--- a/nvidia-video-G06.spec
+++ b/nvidia-video-G06.spec
@@ -94,11 +94,7 @@ Conflicts:      nvidia-computeG05
 Provides:       nvidia-computeG06 = %{version}
 Obsoletes:      nvidia-computeG06 < %{version}
 Recommends:     nvidia-compute-G06-32bit
-%if (0%{?sle_version} >= 150100 || 0%{?suse_version} >= 1550)
 Requires(pre):  update-alternatives
-%else
-Conflicts:      libOpenCL1
-%endif

 %description -n nvidia-compute-G06
 NVIDIA driver for computing with GPGPUs using CUDA or OpenCL.