diff --git a/src/tracker/long_tracker.jl b/src/tracker/long_tracker.jl
index 86b944aa..b40f311f 100644
--- a/src/tracker/long_tracker.jl
+++ b/src/tracker/long_tracker.jl
@@ -22,9 +22,9 @@ Trajectories are built in two steps:
     - "orientation"
     - "perimeter"
     - "mask": 2D array of booleans
-    - "ID": unique identifier
     - "passtime": A timestamp for the floe
     - "psi": the psi-s curve for the floe
+    - "uuid": a universally unique identifier for each segmented floe
 - `condition_thresholds`: 3-tuple of thresholds (each a named tuple) for deciding whether to match floe `i` from day `k` to floe j from day `k+1`
 - `mc_thresholds`: thresholds for area mismatch and psi-s shape correlation
 
diff --git a/src/tracker/tracker-funcs.jl b/src/tracker/tracker-funcs.jl
index 093b55f2..a43b13ca 100644
--- a/src/tracker/tracker-funcs.jl
+++ b/src/tracker/tracker-funcs.jl
@@ -683,3 +683,15 @@ function dropcols!(df, colstodrop)
     select!(df, Not(colstodrop))
     return nothing
 end
+
+function adduuid!(df::DataFrame)
+    df.uuid = [randstring(12) for _ in 1:nrow(df)]
+    return df
+end
+
+function adduuid!(dfs::Vector{DataFrame})
+    for (i, df) in enumerate(dfs)
+        adduuid!(dfs[i])
+    end
+    return dfs
+end
\ No newline at end of file
diff --git a/src/tracker/tracker.jl b/src/tracker/tracker.jl
index 3b7fe6a0..b899c47a 100644
--- a/src/tracker/tracker.jl
+++ b/src/tracker/tracker.jl
@@ -56,9 +56,7 @@ function _pairfloes(
     sort_floes_by_area!(props)
 
     # Assign a unique ID to each floe in each image
-    for (i, prop) in enumerate(props)
-        props[i].uuid = [randstring(12) for _ in 1:nrow(prop)]
-    end
+    adduuid!(props)
 
     add_passtimes!(props, passtimes)