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index 4d7c667..7a8b956 100644
--- a/src/images/tiles/novaterraprime/novaterraprime_tile_17.svg
+++ b/src/images/tiles/novaterraprime/novaterraprime_tile_17.svg
@@ -6,7 +6,7 @@
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+        <g id="tile18">
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diff --git a/src/images/tiles/novaterraprime/novaterraprime_tile_18.svg b/src/images/tiles/novaterraprime/novaterraprime_tile_18.svg
index 74f4942..3e3b8a1 100644
--- a/src/images/tiles/novaterraprime/novaterraprime_tile_18.svg
+++ b/src/images/tiles/novaterraprime/novaterraprime_tile_18.svg
@@ -6,7 +6,7 @@
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