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diff --git a/01-short-introduction-to-Python.html b/01-short-introduction-to-Python.html
index b37ad1722..136f81e49 100644
--- a/01-short-introduction-to-Python.html
+++ b/01-short-introduction-to-Python.html
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 <ol style="list-style-type: decimal"><li>What happens when you execute <code>a_list[1] = 5</code>?</li>
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@@ -880,7 +880,7 @@ <h3 class="callout-title">Changing dictionaries<a class="anchor" aria-label="anc
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-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
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diff --git a/02-starting-with-data.html b/02-starting-with-data.html
index 1ab3e90ca..3695ce122 100644
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diff --git a/03-index-slice-subset.html b/03-index-slice-subset.html
index 8968c4fda..a40751839 100644
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diff --git a/04-data-types-and-format.html b/04-data-types-and-format.html
index be1a7fc7a..346b1bfb4 100644
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@@ -758,7 +758,7 @@ <h3 class="callout-title">Counting<a class="anchor" aria-label="anchor" href="#c
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 <p>The method <code>.count()</code> gives you the number of non-NaN
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@@ -937,7 +937,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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diff --git a/05-merging-data.html b/05-merging-data.html
index 31d1bf798..d55d3f668 100644
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-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
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-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
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@@ -1008,7 +1008,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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diff --git a/06-loops-and-functions.html b/06-loops-and-functions.html
index 46730d174..3ba6332fa 100644
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 <ol style="list-style-type: decimal"><li>
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 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
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 <ol style="list-style-type: decimal"><li>
 <p>For example, using an integer and a string:</p>
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-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
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-<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
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 <ol style="list-style-type: decimal"><li>
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-<div id="collapseSolution6" class="accordion-collapse collapse" data-bs-parent="#accordionSolution6" aria-labelledby="headingSolution6">
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@@ -1701,7 +1701,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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diff --git a/07-visualization-ggplot-python.html b/07-visualization-ggplot-python.html
index 67c381ea7..a875de2c8 100644
--- a/07-visualization-ggplot-python.html
+++ b/07-visualization-ggplot-python.html
@@ -1042,7 +1042,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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diff --git a/08-putting-it-all-together.html b/08-putting-it-all-together.html
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+++ b/08-putting-it-all-together.html
@@ -627,7 +627,7 @@ <h3 class="callout-title">Challenge - Pandas and matplotlib<a class="anchor" ari
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
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-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
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-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
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 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -817,7 +817,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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diff --git a/09-working-with-sql.html b/09-working-with-sql.html
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   "dateCreated": "2015-03-19",
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diff --git a/404.html b/404.html
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diff --git a/CODE_OF_CONDUCT.html b/CODE_OF_CONDUCT.html
index 394289c67..235f04edf 100644
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index a5eccaf80..170e02a5d 100644
--- a/CONTRIBUTORS.html
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diff --git a/LICENSE.html b/LICENSE.html
index f87c0c1b8..05ca7496f 100644
--- a/LICENSE.html
+++ b/LICENSE.html
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   "dateCreated": "2015-03-19",
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diff --git a/aio.html b/aio.html
index ef0f67276..3c78cb0dc 100644
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 <ol style="list-style-type: decimal">
 <li>What happens when you execute <code>a_list[1] = 5</code>?</li>
@@ -1285,7 +1285,7 @@ <h3 class="callout-title">Changing dictionaries<a class="anchor" aria-label="anc
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-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
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 <p>The method <code>.count()</code> gives you the number of non-NaN
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