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-rw-r--r--lib/unitsToRanges.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/unitsToRanges.js b/lib/unitsToRanges.js
index cd572f7..e73388a 100644
--- a/lib/unitsToRanges.js
+++ b/lib/unitsToRanges.js
@@ -54,7 +54,7 @@ module.exports = (units, sourceAddresses) => {
const existingRanges = []
// adapted from https://stackoverflow.com/a/54973116/6702659
- const formedRanges = expandedUnits
+ const formedRanges = [...new Set(expandedUnits)]
.slice()
.map(unit => {
if (unit.split('-').length > 1) {