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-rw-r--r--src/buildstream/_exceptions.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/buildstream/_exceptions.py b/src/buildstream/_exceptions.py
index d5b87a85e..648742dbb 100644
--- a/src/buildstream/_exceptions.py
+++ b/src/buildstream/_exceptions.py
@@ -225,6 +225,9 @@ class LoadErrorReason(Enum):
# An attempt so set the value of a protected variable
PROTECTED_VARIABLE_REDEFINED = 23
+ # A duplicate dependency was detected
+ DUPLICATE_DEPENDENCY = 24
+
# LoadError
#