diff --git a/src/festim/exports/profile_1d.py b/src/festim/exports/profile_1d.py
index 670e9a527..ccc2feefb 100644
--- a/src/festim/exports/profile_1d.py
+++ b/src/festim/exports/profile_1d.py
@@ -45,7 +45,7 @@ def __init__(
         self.t = []
         self.x = None
         self.subdomain = subdomain
-        self.times = times
+        self.times = times.copy() if times is not None else None
 
         self._dofs = None
         self._sort_coords = None
diff --git a/src/festim/helpers.py b/src/festim/helpers.py
index 53e2cf700..47025048b 100644
--- a/src/festim/helpers.py
+++ b/src/festim/helpers.py
@@ -324,7 +324,11 @@ def is_it_time_to_export(
 ) -> bool:
     """
     Checks if the exported field should be written to a file or not based on the
-    current time and the times in `export.times`
+    current time and the times in `export.times'
+
+    After a successful match, the corresponding time is removed from the list to
+    prevent multiple exports for the same target time.
+
 
     Args:
         current_time: the current simulation time
@@ -338,8 +342,9 @@ def is_it_time_to_export(
     if times is None:
         return True
 
-    for time in times:
+    for i, time in enumerate(times):
         if np.isclose(time, current_time, atol=atol, rtol=rtol):
+            times.pop(i)  # consume the time so it is not exported again
             return True
 
     return False