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-rw-r--r--qt-ui/diveplanner.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/qt-ui/diveplanner.cpp b/qt-ui/diveplanner.cpp
index 65a358489..6bc67ada0 100644
--- a/qt-ui/diveplanner.cpp
+++ b/qt-ui/diveplanner.cpp
@@ -1303,6 +1303,11 @@ void DivePlannerPointsModel::tanksUpdated()
// either nothing relevant changed, or exactly ONE gasmix changed
for (int i = 0; i < gases.length(); i++) {
if (gases.at(i) != oldGases.at(i)) {
+ if (oldGases.count(oldGases.at(i)) > 1) {
+ // we had this gas more than once, so don't
+ // change segments that used this gas as it still exists
+ break;
+ }
for (int j = 0; j < rowCount(); j++) {
divedatapoint& p = divepoints[j];
int o2 = oldGases.at(i).first;