diff --git a/CHANGELOG.md b/CHANGELOG.md
index da6bd5d8a6..95dccc8593 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,26 @@ Full documentation for amd_smi_lib is available at [https://rocm.docs.amd.com/pr
 
 ***All information listed below is for reference and subject to change.***
 
+## amd_smi_lib for ROCm 6.2.1
+
+### Additions
+
+- N/A
+
+### Optimizations
+
+- N/A
+
+### Fixes
+
+- **Fixed TypeError in `amd-smi process -G`**.  
+
+- **Updated CLI error strings to handle empty and invalid GPU/CPU inputs**.  
+
+### Known Issues
+
+- N/A
+
 ## amd_smi_lib for ROCm 6.2.0
 
 ### Additions
diff --git a/amdsmi_cli/amdsmi_parser.py b/amdsmi_cli/amdsmi_parser.py
index 4f97ad8f7c..77e4db1831 100644
--- a/amdsmi_cli/amdsmi_parser.py
+++ b/amdsmi_cli/amdsmi_parser.py
@@ -375,6 +375,9 @@ class AMDSMIParser(argparse.ArgumentParser):
 
 
     def _validate_cpu_core(self, value):
+        if value == '':
+            outputformat = self.helpers.get_output_format()
+            raise amdsmi_cli_exceptions.AmdSmiMissingParameterValueException(value, outputformat)
         if isinstance(value, str):
             if value.lower() == "all":
                 return value