Explain when reindex-chainstate can be used instead of reindex

Author: Sjors

src/init.cpp

@@ -384,7 +384,7 @@ void SetupServerArgs()
             "Warning: Reverting this setting requires re-downloading the entire blockchain. "
             "(default: 0 = disable pruning blocks, 1 = allow manual pruning via RPC, >%u = automatically prune block files to stay under the specified target size in MiB)", MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024), false, OptionsCategory::OPTIONS);
     gArgs.AddArg("-reindex", "Rebuild chain state and block index from the blk*.dat files on disk", false, OptionsCategory::OPTIONS);
-    gArgs.AddArg("-reindex-chainstate", "Rebuild chain state from the currently indexed blocks", false, OptionsCategory::OPTIONS);
+    gArgs.AddArg("-reindex-chainstate", "Rebuild chain state from the currently indexed blocks. When in pruning mode or if blocks on disk might be corrupted, use full -reindex instead.", false, OptionsCategory::OPTIONS);
 #ifndef WIN32
     gArgs.AddArg("-sysperms", "Create new files with system default permissions, instead of umask 077 (only effective with disabled wallet functionality)", false, OptionsCategory::OPTIONS);
 #else